CN111851556A - Construction method and structure of soft soil foundation asphalt concrete cushion - Google Patents
Construction method and structure of soft soil foundation asphalt concrete cushion Download PDFInfo
- Publication number
- CN111851556A CN111851556A CN202010722152.8A CN202010722152A CN111851556A CN 111851556 A CN111851556 A CN 111851556A CN 202010722152 A CN202010722152 A CN 202010722152A CN 111851556 A CN111851556 A CN 111851556A
- Authority
- CN
- China
- Prior art keywords
- geotextile
- asphalt concrete
- layer
- soil foundation
- concrete cushion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a construction method and a structure of a soft soil foundation asphalt concrete cushion, the method comprises the steps of digging to a certain depth below the asphalt concrete cushion according to design requirements, digging grooves distributed in a grid shape on a plain soil foundation, filling sea sand in the grooves to form a drainage reinforcing band, and communicating the drainage reinforcing band with a water collecting well; laying a layer of solidified mixture on the plain soil foundation; laying geotextile on the solidified mixture, laying a layer of solidified mixture on the geotextile, and solidifying the upper and lower layers of solidified mixture of the geotextile when meeting water and moist soil to form a geotextile composite layer; paving a gravel cushion layer on the solidified mixture on the upper layer; and paving an asphalt concrete cushion layer on the gravel cushion layer. The invention enhances the bearing capacity of the foundation soil, can effectively isolate the water in the foundation soil, ensures the construction condition of drying the asphalt concrete cushion, and further enhances the corrosion resistance and the impermeability of the underground foundation.
Description
Technical Field
The invention belongs to the field of engineering construction, and particularly relates to a construction method and a structure of a soft soil foundation asphalt concrete cushion layer.
Background
The coastal surface conditions of coastal cities are generally that soil is deep and soft soil layers such as miscellaneous soil, silt, silt and the like, so the problems of corrosion resistance, water leakage and the like of underground foundations frequently occur in coastal projects of soft soil foundations, such as harbors, water conservancy projects, underground projects, tunnels, water diversion projects, road and bridge foundations and the like, the design life is influenced, and how to ensure the construction of asphalt concrete cushions of soft soil foundations, the underground concrete structures are not corroded, and water leakage is prevented.
Disclosure of Invention
The invention aims to provide a construction method and a structure of a soft soil foundation asphalt concrete cushion layer, which can enhance the bearing capacity of foundation soil, effectively isolate the water in the foundation soil, ensure the dry construction condition of the asphalt concrete cushion layer and further enhance the corrosion resistance and the impermeability of an underground foundation.
The technical scheme adopted by the invention is as follows:
a construction method of a soft soil foundation asphalt concrete cushion comprises the following steps:
s1, digging to a certain depth below the asphalt concrete cushion layer according to the design requirement, digging grooves distributed in a grid shape on the plain soil foundation, filling sea sand in the grooves to form a drainage reinforcing belt, and communicating the drainage reinforcing belt with a water collecting well;
s2, paving a layer of solidified mixture on the plain soil foundation;
s3, laying geotextile on the solidified mixture, laying a layer of solidified mixture on the geotextile, and solidifying the upper and lower layers of solidified mixture of the geotextile when meeting water and moist soil to form a geotextile composite layer;
s4, paving a gravel cushion layer on the upper layer of the solidified mixture;
and S5, paving the asphalt concrete cushion on the gravel cushion.
Further, the components of the solidified mixture are dry cement powder, fly ash and stone powder, and the weight percentages of the dry cement powder, the fly ash and the stone powder are respectively 60%, 10% and 30%.
Further, the dry cement powder adopts high sulfate-resistant portland cement; the grade of the fly ash is I grade, the ignition loss is not more than 5 percent, the water content is not more than 1 percent, and the components comprise silicon dioxide, aluminum oxide and ferric oxide; the stone powder is rock particles with particle size less than 0.075mm, and comprises CaCO3。
Furthermore, the grooves are 200mm wide and 300mm deep and are distributed in a groined shape at the interval of 2m multiplied by 2m, the thickness of the solidified mixture of the lower layer is 50mm, the thickness of the solidified mixture of the upper layer is 10mm, the thickness of the gravel cushion is 150mm and the thickness of the asphalt concrete cushion is 100 mm.
Furthermore, the geotextile adopts non-woven geotextile fibers, the transverse tensile strength and the longitudinal tensile strength of the geotextile both exceed 12.5kn, and the equivalent aperture is within the range of 0.07-0.2 m.
Furthermore, the broken stone cushion layer adopts 20 mm-30 mm broken stone, 10 mm-20 mm broken stone, 5 mm-10 mm broken stone and 0-5 mm stone chips.
Furthermore, before the geotextile is laid, the base layer is checked to be flat and firm, then the size of the geotextile is determined according to the field condition, the geotextile is tried to be laid after being cut, and the geotextile is joined by adopting the staggered joint when being laid.
Further, the solidified mixture is uniformly paved by scraping, and the broken stone cushion is uniformly paved by rolling.
A structure of a soft soil foundation asphalt concrete cushion layer comprises a plain soil foundation, wherein grooves distributed in a grid shape are dug in the plain soil foundation, sea sand fills the grooves to form a drainage reinforcing belt, the drainage reinforcing belt is communicated with a water collecting well, a curing mixture, geotextile, a curing mixture, a broken stone cushion layer and an asphalt concrete cushion layer are sequentially paved on the plain soil foundation, and the upper and lower layers of the curing mixture of the geotextile are cured to form a geotextile composite layer when meeting water and moist soil.
The invention has the beneficial effects that:
the drainage reinforcing belt can effectively enhance the bearing capacity of foundation soil and play a role of drainage blind ditches to lead accumulated water to a water collecting well; the geotextile composite layer not only enhances the surface strength of the foundation soil, but also bears the force together with the drainage reinforcing belt, greatly enhances the bearing capacity of the foundation soil, and can effectively isolate the water in the foundation soil to form a water-proof layer, the water on the underground surface layer is discharged through the drainage reinforcing belt and the water collecting well, and the underground water level is ensured to be below the broken stone cushion layer, so that the dry construction condition of the asphalt concrete cushion layer is ensured, and the corrosion resistance and the impermeability of the underground foundation are further enhanced; the geotextile plays roles of isolation, stress dispersion and reinforcement in the geotextile composite layer.
Drawings
FIG. 1 is a plan view of a soil foundation, a drainage reinforcement strip and a collector well according to an embodiment of the present invention.
Fig. 2 is a structural sectional view of the soft soil foundation asphalt concrete mat in the embodiment of the present invention.
In the figure: 1-a drainage reinforcement belt; 2-plain soil foundation; 3-solidifying the mixture; 4-geotextile; 5-a gravel cushion layer; 6-asphalt concrete cushion layer; and 7-a water collecting well.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1 and 2, the soft soil foundation asphalt concrete cushion structure comprises a plain soil foundation 2, grooves distributed in a grid shape are dug in the plain soil foundation 2, sea sand is filled in the grooves to form a drainage reinforcing band 1, the drainage reinforcing band 1 is communicated with a water collecting well 7, a curing mixture 3, a geotextile 4, a curing mixture 3, a gravel cushion 5 and an asphalt concrete cushion 6 are sequentially laid on the plain soil foundation 2, and the upper and lower layers of the curing mixture 3 of the geotextile 4 are cured to form a geotextile composite layer when meeting moisture and wet soil.
The drainage reinforcement belt 1 can effectively enhance the bearing capacity of foundation soil and play a role of drainage blind ditches to lead accumulated water to the water collecting well 7; the geotextile composite layer not only enhances the surface strength of the foundation soil, but also bears the force together with the drainage reinforcing strip 1, greatly enhances the bearing capacity of the foundation soil, and can effectively isolate the water in the foundation soil to form a water-proof layer, the water on the underground surface layer is discharged through the drainage reinforcing strip 1 and the water collecting well 7, and the underground water level is ensured to be below the broken stone cushion layer 5, so that the dry construction condition of the asphalt concrete cushion layer 6 is ensured, and the corrosion resistance and the impermeability of the underground foundation are further enhanced; the geotextile 4 plays roles of isolation, stress dispersion and reinforcement in the geotextile composite layer.
The construction method of the soft soil foundation asphalt concrete cushion comprises the following steps:
s1, digging to a certain depth below the asphalt concrete cushion 5 according to the design requirement, digging grooves distributed in a grid shape on the plain soil foundation 2, filling sea sand in the grooves to form a drainage reinforcing belt 1, and communicating the drainage reinforcing belt 1 with a water collecting well 7;
s2, paving a layer of solidified mixture 3 on the soil foundation 2;
s3, laying the geotextile 4 on the solidified mixture 3, laying a layer of solidified mixture 3 on the geotextile 4, and solidifying the upper and lower layers of solidified mixture 3 of the geotextile 4 when meeting water and moist soil to form a geotextile composite layer;
s4, paving a gravel cushion 5 on the upper layer of the solidified mixture 3;
and S5, paving the asphalt concrete cushion 6 on the gravel cushion 5.
In this embodiment, the components of the cured mixture 3 are dry cement powder, fly ash and stone powder, and the weight percentages of the dry cement powder, the fly ash and the stone powder are respectively 60%, 10% and 30%. The solidified mixture 3 adopts industrial waste fly ash, and is energy-saving and environment-friendly.
In this example, the dry cement powder is high sulfate-resistant portland cement (tricalcium sulfate content in cement is less than or equal to 50.0%, tricalcium aluminate content is less than or equal to 3.0%), suitable for coastal conditions; the grade of the fly ash is I grade, the ignition loss is not more than 5 percent, the water content is not more than 1 percent, the components comprise silicon dioxide, aluminum oxide and ferric oxide, and the fly ash plays a role in curing assistance; the stone powder is rock particles with particle size less than 0.075mm, and comprises CaCO3The raw material of the stone powder is very commonIn this case, the material is easy to obtain.
In this example, the grooves have a width of 200mm and a depth of 300mm, and the grooves are distributed in a matrix shape at a distance of 2m × 2m, the lower layer of the cured mixture has a thickness of 50mm, the upper layer of the cured mixture has a thickness of 10mm, the gravel cushion 5 has a thickness of 150mm, and the asphalt concrete cushion 6 has a thickness of 100 mm.
In the embodiment, the geotextile 4 adopts non-woven geotextile fibers, the transverse tensile strength and the longitudinal tensile strength of the geotextile 4 both exceed 12.5kn, the equivalent aperture is within the range of 0.07-0.2 m, and the mass is 300g/m2And can be well combined with soil.
In this embodiment, the crushed stone cushion 5 is composed of crushed stones with a particle size of 20mm to 30mm, crushed stones with a particle size of 10mm to 20mm, crushed stones with a particle size of 5mm to 10mm, and stone chips with a particle size of 0mm to 5 mm.
In this embodiment, before laying geotechnological cloth 4, check earlier and ensure that the basic unit levels and levels firmly, then confirm geotechnological cloth 4 size and try to spread after tailorring according to the on-the-spot condition, when laying geotechnological cloth 4, adopt the joint by mistake to join. The overlapping length is 30cm, and for uneven ground, the overlapping length of the adjacent geotextiles 4 is not less than 50 cm. It is expected that the geotextile 4 may have large displacement during work to pull the geotextile open, and therefore the geotextile is joined in a staggered manner.
In the present example, a uniform laying of the solidified mixture 3 is achieved by scraping and a uniform laying of the gravel pack 5 is achieved by rolling.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (9)
1. A construction method of a soft soil foundation asphalt concrete cushion is characterized in that: comprises the steps of (a) carrying out,
s1, digging to a certain depth below the asphalt concrete cushion layer according to the design requirement, digging grooves distributed in a grid shape on the plain soil foundation, filling sea sand in the grooves to form a drainage reinforcing belt, and communicating the drainage reinforcing belt with a water collecting well;
s2, paving a layer of solidified mixture on the plain soil foundation;
s3, laying geotextile on the solidified mixture, laying a layer of solidified mixture on the geotextile, and solidifying the upper and lower layers of solidified mixture of the geotextile when meeting water and moist soil to form a geotextile composite layer;
s4, paving a gravel cushion layer on the upper layer of the solidified mixture;
and S5, paving the asphalt concrete cushion on the gravel cushion.
2. A construction method of a soft soil foundation asphalt concrete cushion as claimed in claim 1, characterized in that: the components of the solidified mixture are dry cement powder, fly ash and stone powder, and the weight percentages of the dry cement powder, the fly ash and the stone powder are respectively 60%, 10% and 30%.
3. A construction method of a soft soil foundation asphalt concrete cushion layer as claimed in claim 2, characterized in that: the dry cement powder adopts high sulfate-resistant portland cement; the grade of the fly ash is I grade, the ignition loss is not more than 5 percent, the water content is not more than 1 percent, and the components comprise silicon dioxide, aluminum oxide and ferric oxide; the stone powder is rock particles with particle size less than 0.075mm, and comprises CaCO3。
4. A construction method of a soft soil foundation asphalt concrete cushion as claimed in claim 1, characterized in that: the width of the grooves is 200mm, the depth of the grooves is 300mm, the grooves are distributed in a groined shape at the interval of 2m multiplied by 2m, the thickness of the solidified mixture at the lower layer is 50mm, the thickness of the solidified mixture at the upper layer is 10mm, the thickness of the gravel cushion is 150mm, and the thickness of the asphalt concrete cushion is 100 mm.
5. A construction method of a soft soil foundation asphalt concrete cushion as claimed in claim 1, characterized in that: the geotextile adopts non-woven geotextile fibers, the transverse tensile strength and the longitudinal tensile strength of the geotextile both exceed 12.5kn, and the equivalent aperture is within the range of 0.07-0.2 m.
6. A construction method of a soft soil foundation asphalt concrete cushion as claimed in claim 1, characterized in that: the broken stone cushion layer adopts 20 mm-30 mm broken stones, 10 mm-20 mm broken stones, 5 mm-10 mm broken stones and 0-5 mm stone chips.
7. A construction method of a soft soil foundation asphalt concrete cushion as claimed in claim 1, characterized in that: before laying the geotextile, checking to ensure that the base layer is flat and solid, then determining the size of the geotextile according to the field condition and trying to lay after cutting, and adopting staggered joint for joining when laying the geotextile.
8. A construction method of a soft soil foundation asphalt concrete cushion as claimed in claim 1, characterized in that: the solidified mixture is uniformly laid by scraping, and the broken stone cushion is uniformly laid by rolling.
9. The utility model provides a structure of soft soil foundation bituminous concrete bed course which characterized in that: the soil foundation is characterized by comprising a soil foundation, wherein grooves distributed in a grid shape are excavated in the soil foundation, sea sand fills the grooves to form a drainage reinforcing belt, the drainage reinforcing belt is communicated with a water collecting well, a curing mixture, geotextile, a curing mixture, a gravel cushion and an asphalt concrete cushion are sequentially laid on the soil foundation, and the upper and lower layers of the geotextile are cured to form a geotextile composite layer when meeting water and moist soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010722152.8A CN111851556A (en) | 2020-07-24 | 2020-07-24 | Construction method and structure of soft soil foundation asphalt concrete cushion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010722152.8A CN111851556A (en) | 2020-07-24 | 2020-07-24 | Construction method and structure of soft soil foundation asphalt concrete cushion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111851556A true CN111851556A (en) | 2020-10-30 |
Family
ID=72951166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010722152.8A Pending CN111851556A (en) | 2020-07-24 | 2020-07-24 | Construction method and structure of soft soil foundation asphalt concrete cushion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111851556A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000017457A1 (en) * | 1998-09-17 | 2000-03-30 | National Research Council Of Canada | A method and structure to alleviate the effect of frost heave around manholes |
| CN105839938A (en) * | 2016-04-15 | 2016-08-10 | 张家港英华材料科技有限公司 | Building strengthening structure and building strengthening method |
| CN106915936A (en) * | 2017-02-24 | 2017-07-04 | 浙江省交通规划设计研究院 | A kind of muck soil composite curing agent and application |
| CN207227881U (en) * | 2017-08-18 | 2018-04-13 | 中铁十五局集团第五工程有限公司 | Subgrade and pavement structure filled with argillaceous siltstone |
| CN208649826U (en) * | 2018-06-29 | 2019-03-26 | 中建水务环保有限公司 | The pervious asphalt road of Collapsible Loess District |
-
2020
- 2020-07-24 CN CN202010722152.8A patent/CN111851556A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000017457A1 (en) * | 1998-09-17 | 2000-03-30 | National Research Council Of Canada | A method and structure to alleviate the effect of frost heave around manholes |
| CN105839938A (en) * | 2016-04-15 | 2016-08-10 | 张家港英华材料科技有限公司 | Building strengthening structure and building strengthening method |
| CN106915936A (en) * | 2017-02-24 | 2017-07-04 | 浙江省交通规划设计研究院 | A kind of muck soil composite curing agent and application |
| CN207227881U (en) * | 2017-08-18 | 2018-04-13 | 中铁十五局集团第五工程有限公司 | Subgrade and pavement structure filled with argillaceous siltstone |
| CN208649826U (en) * | 2018-06-29 | 2019-03-26 | 中建水务环保有限公司 | The pervious asphalt road of Collapsible Loess District |
Non-Patent Citations (1)
| Title |
|---|
| 易东文: "《凝固的诗篇 中国国贸二期工程管理纪实》", 31 January 2000, 改革出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108442200B (en) | Domestic garbage incineration ash mixed soil composite reinforced roadbed and construction method thereof | |
| CN107675577B (en) | Road subgrade closed cushion structure in soft soil area and construction method thereof | |
| CN113186766A (en) | Shallow soft soil foundation foam light soil embankment structure and construction method | |
| CN110080166B (en) | Geotextile bag dam reinforcing method | |
| CN110847124A (en) | Concrete panel rock-fill dam with multiple anti-seepage structures and construction method thereof | |
| CN106542769A (en) | A kind of composite of laying porous pavement | |
| CN112627202A (en) | Waterproof slope protection | |
| CN112195965A (en) | Expansive soil cutting retaining wall | |
| CN111851556A (en) | Construction method and structure of soft soil foundation asphalt concrete cushion | |
| CN111350164B (en) | Anti-freezing damage near-water retaining wall and construction method | |
| CN212248171U (en) | Offshore artificial island structure suitable for silt foundation | |
| CN111335290B (en) | Offshore artificial island structure suitable for silt foundation and construction method | |
| CN212294202U (en) | Expansive soil field terrace embankment filling structure | |
| CN114318993A (en) | Cold region highway cutting slope interlayer water disease treatment method | |
| CN110439014B (en) | Underground layered drainage structure and construction method thereof | |
| CN209384261U (en) | A kind of anti-deformation cracking retaining wall structure | |
| CN210031693U (en) | Trinity original ecology prevention of seepage system | |
| CN220846895U (en) | Roadbed structure for filling phyllite filler into high embankment | |
| CN110593242A (en) | Heavy-load ground foundation structure of seepage-proofing area of soft foundation and processing method thereof | |
| CN218508155U (en) | Old and useless cement concrete pavement regeneration piece road surface that gathers materials | |
| CN215051733U (en) | Construction access road structure in deep soft soil area | |
| CN114351526B (en) | Soft soil roadbed structure system and construction method | |
| CN212358188U (en) | Prevent frostbite damage face water revetment structure | |
| CN212983925U (en) | Water supply pipeline foundation cushion structure suitable for high-settlement soft soil foundation | |
| CN110273339B (en) | Ground sinking anti-cracking structure and construction method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201030 |